Method of swaging and straightening tubing and mechanism for use therein.



C. TIBBOTT.

METHOD OF SWAGING AND STRAIGHTENING TUBING AND MECHANISM FOR USE .THEREIN.

, APPLICATION FILED FEB. 28. I917. ly2877910 ENTOIQI/ 6/7 Qr/es 77/95 0/7- Putented Dec. 1?, 1918.

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METHOD OF SWAGING AND STRAIGHTENING TUBING AND MECHANISM FOR USE THEREIN.

APPLICATION FILED FEB. 28.1917. N Patented Dec. 11, 1918.

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METHOD OF SWAGING AND STRAIGHTENING TUBING AND MECHANISM FOR USE THEREIN.

APPLICATION FILED FEB. 28. I917.

Patented Dec. 17, 1918.

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C. TIBBOTT. v METHOD OF SWAGlNG AND STRAIGHTENING TUBING AND MECHANISM FOR USE THEREIN.

APPUCATION FILED FEB. 28,1917- Patented Dec. 17, 1918.

5 SHEETSSHEET 4 LIL! I MU Q/TNEW;

Patented D90. 17, 1918.

5 SHEETSSHEET 5- C. TiBBOTT.

METHOD OF SWAGING AND STRAIGHTENING TUBING AND MECHANISM FOR USE THEREIN.

APPLICATION FELED FEB. 28. IBII" K I .v E; III m w m md ,T

,0 Q H a z 01 3 W r/ u B ill \ikllsllllill CHARLES TIBBOTT, OF CLEVELAND,

s'rn'rns PATENT ornrcn.

OHIO, ASSIC NOR TO THE STANDARD PARTS COMPANY, OF CLEVELAND, OHIO,

A CORPORATION OF OHIO.

METHOD OF SWAGING AND STRAIGHTENING TUBING AND MECHANISM FOR USE THEREIN.

Specification of Letters Patent.

Patented Dec. m, 1918.

Application filed February 28, 1917. 'Serial No. 151,418.

principle, so as to distinguish it from other inventions.

As is well known, more or less difficulty is encountered in feeding tubing through swaging machines for the purpose of reducing the diameter of such tubing, for it is necessary that the stock should be rotated, if a uniform reduction in such diameter and a smooth finish is to be secured. The pres ent invention has as its object the provision of means for automatically feeding the tubing, or other similar stock through the swaging device proper, and at the same time automatically effecting and controlling the rotation thereof in such a manner as to produce a satisfactory product. To the accomplishment ofthe foregoing and related ends, the invention,

the steps and means hereinafter fully dethen, consists of scribed and particularly pointed out in the claims;

The annexed drawing and the following description set forth in detail certain steps and mechanism for carrying out the invention, such disclosed means constituting, however, but one of various ways in which the principle of the invention may be used.

In said annexed drawing Figure 1 is a side elevational view of a combined tube-swaging and straightening machine embodying my present improvements; Fig. 2 is an end elevation of the same, as viewed from the left in Fig. 1; Fig. 3 is an end elevation of one of the feeding devices, which form a feature of such machine, taken by itself; Fig. 4 is a side elevational view of such device; Fig. 5 is a plan view of the same; while Fi s. 6, "2' and 8 are sections taken on the p anes indicated by the lines 6-6, 7-7, and 8--8, respectively, Fig. 5.

Referring first to the general assembly of the machine as illustrated in Fig. 1, the

- spindle-bearing,

swaging device proper is contained in the housing 1 and being of familiar construction is not illustrated in detail. It will suffice, in other words, to state that it consists of a series of hammers, which are sue-c cessively actuated inwardly to strike blows on the tubing passed centrally through such housing, these successive hammer blows not only having the swaging effect, whereby the diameter of exterior highly polished, vbut also having a tendency to rotate the stock in the direction in which the hammers successively strike such tubing. Actuation of this swag-2 in device is secured by means of a. tubular driving shaft 2, journaled in suitable bearings 3, and driven by means of a belt 4 passing over a pulley 5 mounted on such shaft, intermediately between such bearings.

Two feeding devices 6, according to the present design, are employed in conjunction with such swager, one at each end, as shown in Fig. 1. Each such device is driven through sprocket chain 7 from a counter shaft 8 journaled in suitable bearings 9 disposed to one side of the main shaft, and driven from such main shaft through the medium of a'belt 10 and pulleys 11 and 12, as clearly shown in Fig. 2.

Each such feeding device (see Figs. 3, 4 and 5) comprises a pair of similar, peripherally grooved feed rolls 15, the spindles 16 of which are journaled in the free ends of similar arms 17 that have their opposite ends pivotally secured to a hollow supportmg one on each side of the latter, passing through cars 20 on said arms. Compression springs 21 are held against such arms, intermediate between their ends, by means of nuts '22 on threaded studs 23 projecting oppositely from the hollow member 18, whereby the rolls 15, it will be seen, may be caused to grip a tube, or other article, that extends through such member, with any desired degree of pressure.

On opposite ends of the spindles 16, are mounted spur-gears 24, that respectively mesh with other spur-gears 25 mounted on the same bolts 19, that secure the armed? to the hollow member 18, these-bolts being suitably formed to provide the necessary While attached to each of said last-named sp11r-gears,is a bevel gear 2 the tube is reduced, and its member 18 by means of'stud-bolts 19,

with its face directed inwardly, that meshes with a fixed bevel-pinion 27 of annular form. The latter surrounds said tubular member and is attached to one. of the two standards 28 in which the said hollow member, with all the parts carried thereby, is rotatably supported. One end of said member pro ects through the adjacent standard to receive the sprocket-wheel 29, by means of which the device is driven from the countershaft 8 previously referred to. The device as a-whole, save for this sprocketwheel, is inclosed in a suitable housing 30 in the assembled condition of the machine, as illustrated in Figs. 1 and 2.

From the construction of the feeding device, as just described, it'will be seen that upon rotation of the hollow member 18, through the medium of sprocket-chain 7, the feed-rolls 15 Will be driven, by means of the spur and bevel-gears connecting them with the stationary bevel-pinion 27, at a rate of speed depending upon the rate of rotation of the device as a whole. The rotation of these devices, it will accordingly be seen, is efiective not only to rotate the stock, but also simultaneously to feed the same forwardly, both devices being geared, of course, to feed in the same direction, and at the same rate of speed.

The rate of rotation of the stock, however, as determined by the rate of rotation of these devices, is designed, by a proper selection of gear ratios, to be slower than that which would normally be produced by the action of the swaging machine 1, if the latter were operating by itself. In this way, it will be seen that, incidentally to the automatic feeding of the stock through the swaging device proper, the stock is rotated in the same direction as the latter would tend to rotate it, but at a lower rate of speed. This avoids the difliculty which arises, as hereinbefore described, Where the stock is held entirely against rotation, or where it is left free to rotate with the swinging device. At the same time, the operator is relieved from the very great strain of holding the tube or other article being swaged, and manually directing the same through the machine as well as regulating its rate of rotation. Uni- "formity in the finished product is of course another valuable result achieved by the fore going arrangement of mechanisms.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the means and the steps herein disclosed, provided those stated by any one of the following claims or their equivalents be employed.

therefore particularly point out and distinctly claim as my invention r 1. 'lhe method of swaging tubing and like articles, which consists in introducing the same into a swaging device of the kind, adapted to impart a rotary movement to such' article, and simultaneously feeding such article longitudinally through said device and rotating the same at a controlled rate difi'erent from that which said device would impart thereto.

2. The method of swaging tubing and like articles, which consists in introducing the same into a swaging device of the kind adapted to impart a rotary movement to such article, and simultaneously feeding such article longitudinally through said device and rotating the same at a controlled rate slower than that which said device would impart thereto.

3. In mechanism of the character described, the combination with a swaging device of the kind adapted to impart a rotary movement toan article introduced therein; of feeding mechanism ada ted simultaneously to feed such article t rough said device and impart an independent rotary movement thereto.

4. In mechanism of the character described, the combination with a swaging device of the kind adapted to impart a rotary movement to an article introduced therein; of feeding mechanism adapted simultaneously to feed such article through said device and impart an independent rotary movement thereto, said feeding mechanism being geared to thus rotate such article at a slower rate than said device would impart thereto.

5. In mechanism.- of the character described, the combination with a swaging device of the kind adapted to imp-art a rotary movement to an article introduced therein; of a pair of feeding mechanisms alined with said device, one on each side thereof, said mechanism being adapted to grip and positively rotate such article at the same time that it feeds the same longitudinally through said device.

6. In mechanism of the character described, the combination with a swaging device of the kind adapted to impart a rotary movement to an article introduced therein; of a pair of feeding mechanisms alined with said device, one on each side thereof, said mechanisms being adapted to grip and positively rotate such article at the same time that they feed the same longitudinally through said device, and said mechanisms being geared thus to rotate said stock at a slower rate than said device would impart thereto.

7. In mechanism of the character described, the combination with a swinging device of the kind ada ted to impart a rotary movement to an article introduced therein; of a pair of feeding mechanisms alined with said device, one on each side thereof, each of said mechanisms comprising a positively rotated hollow member through which the article passes, rolls carried by said member adapted to grip such article, and gearing adapted to rotate said rolls incidentally to rotation of said member.

8. In mechanism of the character described, the combination with a swaging device of the kind adapted to impart a rotary movement to an article introduced therein;

of a pair of feeding mechanisms alined with said device, one on each side thereof, each of said mechanisms comprising a positively rotated hollow member through which the article passes, rolls carried by said member adapted to grip such article, and gearing adapted to rotate said rolls incidentally to rotation of said member, the gearing connections to said members being arranged to rotate the same, and thus the article gripped by said rolls, at a rate slower than said device would impart thereto.

Sgned by me, this 24th day of February, 191

CHARLES TIBBOTT.

Attested by O'r'ro H. JOBSKI, M. H. WILLIAMS. 

